module Her
  module Middleware
    class ParseJSON < Faraday::Response::Middleware
      # @private
      def parse_json(body = nil)
        body = '{}' if body.blank?
        message = "Response from the API must behave like a Hash or an Array (last JSON response was #{body.inspect})"

        json = begin
          MultiJson.load(body, :symbolize_keys => true)
        rescue MultiJson::LoadError
          raise Her::Errors::ParseError, message
        end

        raise Her::Errors::ParseError, message unless json.is_a?(Hash) or json.is_a?(Array)

        json
      end
      
      def assert_response_ok(status, message)
        if exception_class = Her::Errors.exception_class_for_status(status)
          raise exception_class, message
        end
      end
      
    end
  end
end